package chapter05.e9;

public class E9 {
    private static final int TIMES = 100000;

    public static void main(String[] args) {
        E9.testString();
        E9.tesrStringBuffer();
        E9.tesrStringBuilder();
    }
    public static void testString(){
        long starTime = System.currentTimeMillis();
        String str = "";
        for (int i = 0; i < TIMES; i++){
            str += "test";
        }
        long endTime = System.currentTimeMillis();
        System.out.println("String test usedtime:" + (endTime - starTime));
    }
    public static void tesrStringBuffer(){
        long starTime = System.currentTimeMillis();
        StringBuffer str = new StringBuffer();
        for (int i = 0; i < TIMES; i++){
            str.append ("test");
        }
        long endTime = System.currentTimeMillis();
        System.out.println("StringBuffer test usedtime:" +(endTime - starTime));
    }
    public static void tesrStringBuilder(){
        long starTime = System.currentTimeMillis();
        StringBuffer str = new StringBuffer();
        for (int i = 0; i < TIMES; i++){
            str.append ("test");
        }
        long endTime = System.currentTimeMillis();
        System.out.println("StringBuffer test usedtime:" +(endTime - starTime));
    }
}
